Piston for engines.



G, T. S'I'RITB.

PISTON FOR ENGINES.

APPLIUAToN Hmm Nov. 14, 1912` 1,076,326, Patented 0ct.21,1913.

74717/765565: fnl/e 11/0 n f ogm@ Geary@ 2157/7216. d. W

yx W/ /S frfy GEORGE T. STRITE, 0F MINNEAPOLIS, MINNESOTA.

PISTON FOR ENGINES.

Specification of Letters Patent.

Patenten ct. 21, 1913.

Application fled November 14,191.8 Serial No. 731,341.

To all whom it may concern.'

Be it known that I, GEORGE T. S'mrrlz, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and 'useful Improvements in Pistonsy for Engines, of which the following Yis a specification.

My invention relates to pistons for engines, and 'particularly to such pistons as are employed in engines of the explosive type and has `for its object to provide a piston such that the pitman or connecting red inay be readily attached thereto or detached therefrom without the necessity of removing the piston from the cylinder.v My improved piston also has` the advantage of presenting a smooth cylindrical surface to the inner wall of the cylinder in which the pin for securing the pitman thereto does not penetrate. My invention also provides the means for taking up wear in the bearing of the pin which connects the pitman to the piston.

The full objects and advantages of my invention will appear in connection with the detailed description thereof and are particularly pointed out in the claims.

In the drawings illustratingthe application of my invention 'n one form,-Figure 1 illustrates a sectiona view of my piston showing the manner of assembling the parts and viewedtransversely to the connecting pin. Fig. 2 is a similar sectional view along thc line of'the connect`ing pin. section on line 33 of Fig. 1. Fig. 4 is a section on line 4-4 of Fig. 1. Fig. 5 is a plan 'view from beneath showing the manner of screwing the parts into position. Fig. 6 is a sectional View from beneathl indicating the manner in which the' thread wing is locked in position.

A cylindrical piston 10 of usual exterior construction is provided with a circular shoulder 11 above an enlarged interior cylindrical space 12 within the piston. A ring Y13 is cast downwardly from the top 14 of the piston and has its lower margin in the plane of the circular shoulder 11. The means for holding the connecting rod` pin within the piston comprises a pair of complemental blocks 15 and 16 each' having an outer cylindrical surface adapted 'to fit closely the inner surface of the enlarged portion 12 of the piston, the block 15 being adapted to engage the shoulder 11 and the face of the ring 13. Block 15 is provided Figlsa with a semi-circular half-bearing 17;l a simi-A lar and eomplemental semi-circular halfbearing 18 being provided in block 16. The. half-bearings 17 and 18 may, if desired, be .lined with Babbitt or other bearing metal and when properly positioned form a bearing for the connecting rod pin 19.

Extending at right angles to the halfbearings 1'1"*18 is formed in each of the blocks 15 and 16 an elongated aperture 20 through which the head 21 of the connectA ing rod or pitman will extend to be secured to the pin 22'. A ring nut 23 threaded as indicated at 24 to the interior of the portion 12 of cylinder 10 forces block 16 towardblock 15 in contact with ledge 11 and ring 13.

The manner o f assembling the parts will be quite obvious. The -block 16 will first be placed over head 21' of connecting rod and pin 19 inserted through the usual aperture in the head 21 Yprbvided for that purpose. Block 15 will then sition against ledge 11 and ring 13 anc' means of ring nut 23 the block 16 will be forced up to bring half-bearings 18 and 17 into the proper relative position with re spect to connecting rod pin 19. For turn-- ing the nut 23 Lthe' v vrench25 such as shown in Figs. 1 and 5 may be employed, the nut 23 being provided with a series of teeth 26 inv which the spread ends of the wrench may be engaged. A leaf spring 27 such as indicated in Figs. 2 and 6 engages the teeth 26 'and prevents premature loosening of ring nut 23.

From the above it will be seen that my piston enables the connecting rod to be attached thereto or detached with the greatest facility and without the necessity of removing the piston'ffom the cylinder. The connecting pin 19 'it entirely within the body of the piston and oes not even enter the Walls thereof, so that the scoring action which frequently takes place when the connecting pin extends through the wall of the piston and is supposedly milled flush therewith cannot take place. Then the bearing formed by complcmental half-bearings 17 and 18 becomes Worn to any extent the block 16 may readily be set up to take up this bearing. Moreover, the position of the piston relative to' the cylinder may be varied at will. This is a matter of importance. As is Well known, the wear of the piston against the inner walls of the cylinder takes place principally in the sides along the plane be pushed into shoulder and means for of the stroke. B v loosening up the turn nut 23 the piston l0 may be rotated on the blocks -16 so as to bring a new bearing surface thereof into the area of greatest Wear, thus materially increasing the life of the piston.

I claim:

1. A piston comprising al hollow cylinder having an expanded cylindrical interior provided with transverse shoulders, a pair of cylindrical blocks within the expanded portion provided with complemental half-bearings, one of said blocks bearing against the removably securing the blocks Within the cylinder.

2. A piston comprising a hollow cylinder having an expanded cylindrical interior provided with transverse shoulders, a pair of cylindrical blocks Within the expandpd p0rtion provided With complemental half-bearings, one of said blocks bearing against the shoulder, apiston rod, a pin in said bearings for connectingr said rod and means for holding the blocks positioned in contact With said pin and against said shoulder.

3. A piston comprising a hollow cylinder, a pair of cylindrical bearing blocks Wit-hin said cylinder each provided with a complemental half-bearing and an elongated aperture at right angles thereto, a pin in said bearing, a piston rod having the head there; of extending through said aperture and being connected by said pin and means'for removably and adjustably holding the blocks within the piston.

In testimony whereof I aflix my signature 1n presence of two Witnesses.

GEORGE T. STRITE. Witnesses F. A. VVHI'IELEY,A H. A. BOWMAN. 

